View clinical trials related to Aortic Valve Stenosis.
Filter by:Study of platelet activation by severe aortic stenosis and its correction by Transcatheter Aortic Valve Implantation (TAVI)
The objective of this study is to confirm the safety and effectiveness of the Lotus™ Valve System in the Japanese medical environment for transcatheter aortic valve replacement (TAVR) in symptomatic subjects with calcific, severe native aortic stenosis who are considered at high or extreme risk for surgical valve replacement.
The central hypothesis of this study is that TAVR leads to platelet deposition and inflammatory cell activation that can be attenuated by the potent anti-platelet and/or pleiotropic effects of ticagrelor. This single center, prospective randomized trial addresses the following specific aims: 1. To determine whether high-potency ADP receptor blockade reduces measures of platelet activation in patients after TAVR. 2. To determine whether high-potency ADP receptor blockade mitigates the pro-thrombotic inflammatory response observed after TAVR.
The primary objective of the current study is to determine whether Ataciguat (HMR1766) slows progression of valve calcification in patients with moderate calcific aortic valve stenosis. Secondary and tertiary objectives are to determine whether Ataciguat slows progression of aortic valve function, reduces systemic inflammation, and prevents left ventricular dysfunction in patients with moderate calcific aortic valve stenosis.
This study is designed to monitor the safety and performance of the V8 balloon when used as a postdilatation balloon in self-expanding Transcatheter Aortic Valve Implantation (TAVI) device procedures. The study product is CE marked for balloon aortic valvuloplasty (BAV), and is being investigated for an expanded intended use.
This is a randomized trial that will evaluate the role of balloon aortic valvuloplasty (BAV) on the outcome of patients undergoing transcatheter aortic valve implantation (TAVI) procedure. Patients will undergo a physical exam, coronary angiography and computed tomography angiography before TAVI. The randomization for direct or non-direct TAVI ( with BAV or without BAV) will take place 24 hours prior to the procedure by the core lab at Hippokration Hospital in Athens. The same lab will analyze in blind fashion the results of all the imaging modalities for each patient. The patients will be followed during the hospital stay and at 30 days and 1 year thereafter by echocardiography. The procedure of predilatation will be at the operator's discretion.
Whether to intervene in asymptomatic patients with severe aortic stenosis and normal left ventricular ejection fraction remains controversial. The investigators therefore try to compare clinical outcomes of elective aortic valve replacement to conventional treatment and watchful waiting strategy in a prospective randomized trial.
Transcutaneous trans-aortic valve replacement (TAVR) is now a common procedure to treat symptomatic aortic stenosis. Although as effective and safe as surgical aortic valve replacement, it is still restricted to high surgical risk patient who are frail. The aim of the TAVI-EVA is to identify geriatric biomarkers that may help to predict survival and functional recovery after TAVR
The investigators want to compare the effects of two drugs, levosimendan and milrinone, on cardiac muscle, both in terms of contractility and relaxation. Half of the participants will be randomized to each drug. The effects will be measured through echocardiographic deformation analyses. Since deformation analyses could be dependent on different loading conditions of the heart, a second purpose of the study is to investigate the changes on deformation parameters after applied changes in preload and afterload, but also heart rate.
The hypothesis behind this study is that there is a proportion of patients considered high or intermediate risk for surgery, but relatively low risk for TAVI, which can be discharged early after the procedure (within the first 2-3 days) without additional risks. Therefore, when performed in safety, an early discharge may cut periprocedural TAVI costs significantly.